Hello derf!
Like jroberts has already told us, there are no tutorials built into X-Plane itself, but there is a vast source of community supported information, discussion, tutorials ... you just name it ... in the case you can't find your answer in these forums.
My favourite source of information (for "A Ground School Of Flying A Cessna 172SP, for example) can be found on the X-Plane.org. For a "better experience of usage", i suggest you register as an user (yes, it is free) and do a search on the vast database of everything related to X-Plane.
-pkortetj